condition	mean	min	max
4 h after light	18.0989295	14.822799	21.37506
8 h after light	18.871712	14.034697	23.708727
12 h after light	14.357787	14.097413	14.618161
4 h after dark	13.4460435	13.22983	13.662257
8 h after dark	13.2505885	11.678378	14.822799
12 h after dark	17.534601	17.534601	17.534601